AS39513 datasheet(73/108 Pages) AMSCO

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ams Datasheet

Page 73

[v1-10] 2018-Apr-25

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AS39513 − Detailed Description

Stay Quiet Command

Stay Quiet Command Request:

There is no response to the stay quiet command. The stay quiet

command must be executed in addressed mode (In NFLAGS,

SELECT = 0 and ADDR = 1), so the UID is mandatory. After

receiving the stay quiet command, the AS39513 will remain in

the quiet state until the device is reset, it receives a select

request, or it receives a reset to ready request. In the quiet state,

the device will not process any command where IFLAGS are

used. It will process an addressed request.

Read Block Command

Read Block Command Request:

Read Block Command Reply:

The read block command reads four bytes from the EEPROM’s

Application and Measurement areas. The starting byte address

to read is 4*BADDR. If the OPTION flag is 1, a security status is

returned. If the OPTION flag is 0, no security status is returned.

In either case, the four bytes in the block are returned, lowest

address and LSB first.

The security status will be 0x00 if the block is not locked, and

0x01 if the block is locked either through the lock bits or the

LKALL flag.

SOF

Flags

Command

UID

CRC

EOF

NFLAGS*

0x02

64 bits

16 bits

SOF

Flags

Command

UID

BADDR

CRC

EOF

NFLAGS

0x20

64 bits

8 bits

16 bits

SOF

Flags

Security Status

Block Data

CRC

EOF

RFLAGS

8 bits

4*8 bits

16 bits

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